After nine months of hard fighting, yesterday financial reform came down to this: an amendment, proposed by Senators Jeff Merkley and Carl Levin that would have forced big banks to get rid of their speculative proprietary trading activities (i.e., a relatively strong version of the Volcker Rule.)

The amendment had picked up a great deal of support in recent weeks, partly because of unflagging support from Paul Volcker and partly because of the broader debate around the Brown-Kaufman amendment (which would have forced the biggest 6 banks to become smaller). Brown-Kaufman failed, 33-61, but it demonstrated that a growing number of senators were willing to confront the power of our biggest and worst banks.

Yet, at the end of the day, the Merkley-Levin amendment did not even get a vote. Why?